Inhalation mask



FIG. 1 is a front elevational view of an inhalation mask showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a transverse sectional view thereof and is taken along line 3--3 of FIG. 1;

FIG. 4 is a right side elevational view thereof; the left side view being a mirror image of FIG. 4;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for an inhalation mask, substantially as shown. 